Products — Well Logging, Production Logging & LWD Systems

PILS-X Extended-Reach Push Logging System

High-temperature, high-pressure, high-strength logging for long-reach horizontal wells — 200 °C / 170 MPa, 20 t tensile and compressive rating.

The PILS-X system was developed to solve a problem that has limited extended-reach logging for years. In long-reach horizontal wells, conventional tool strings are long and relatively fragile — the weakest section may be rated for as little as 500 kg of compression — so tools are easily damaged and the logging job cannot be completed.

PILS-X is fully compatible with the 5700 logging system. The main body is Ø96 mm, with tensile and compressive ratings of 20,000 kg, a temperature rating of 200 °C and a pressure rating of 170 MPa. It operates in both wireline and memory modes, and is suited to conventional wells as well as to harsh high-angle and long-reach horizontal wells. Log quality is consistent with conventional 5700 wireline data.

The neutron tool uses a retrievable design, reducing the risk of a radioactive source being lost downhole. In memory mode the tool string is connected directly to the drill pipe, so data can be recorded while running in and again while pulling out — two logging passes in a single trip — which improves both operational reliability and curve quality.

Specifications
Maximum compressive strength	20 t
Maximum tensile strength	20 t
Tool string temperature rating	200 °C
Tool string pressure rating	170 MPa
Main body OD	Ø96 mm
Maximum tool string OD	Ø127 mm
Battery capacity	50 Ah; >80 h continuous operation
Memory sampling rate	2 samples/s
Recommended logging speed (memory)	9 m/min
Memory data retrieval	USB
Wireline logging mode	Same as conventional 5700 logging
Downhole telemetry	WTS
Measurement suite	Resistivity: laterolog, array laterolog or array induction Acoustic: digital sonic or dipole array sonic Nuclear: spectral gamma, compensated neutron, litho-density Auxiliary: four-parameter, SP, deviation/azimuth, caliper

WILS-P High-Speed Pulse-Code High-Temperature Logging Platform

185 °C platform with no Dewar flask, 160 MPa — sufficient for horizontal wells to 8,000 m true vertical depth.

The WILS-P platform is a high-speed pulse-code logging system built for high-temperature, high-pressure wells. It reaches the 185 °C class and operates for more than 30 hours above 175 °C, with a maximum pressure rating of 160 MPa — sufficient for horizontal wells with a true vertical depth of 8,000 m.

The platform combines an integrated tool design with a compact string, so a full logging suite can be run in a single trip.

Design highlights

No Dewar flask required
3514, spectral gamma and deviation combined in a single tool
Micro-spherical electrode replaced by a micro-cylindrical design; density and micro-cylindrical sensors combined into one composite probe
1680 digital sonic electronics and sensors integrated into a single unit
Laterolog electronics and electrodes integrated, using constant-power drive
Three-arm / four-arm caliper with spring-loaded mechanism — no motor, fewer failure points

Overall specifications
Maximum temperature class	185 °C
Duration above 175 °C	>30 h
Maximum pressure class	160 MPa
Well depth capability	Horizontal wells to 8,000 m TVD
Dewar flask	Not required

Main logging tools

pWAIT-A Array induction

pDLL-A Integrated dual laterolog

pDAL-A Integrated digital sonic

pCCL-A Magnetic collar locator

pDIL-A Dual induction / 8-laterolog

pTTM-A Three-parameter tool

pSTC-A Lantern four-arm caliper

pWCR-G Telemetry–inclination–gamma

pWCR-GS Telemetry–inclination–spectral gamma

pWCN-A Compensated neutron

pWZD-A Litho-density

Auxiliary tools

pWIB-A Insulated sub

pWIB-B WTS interface Type-B insulated sub

pWSS-A Rotating sub

pWKJ-A Flex sub

pWRB-A Hard electrode

pWSP-A SP hard electrode

pBDL-A Cable head

pCEN-A Wire-through centralizer

pCEN-B Lantern-type centralizer

HRSG-1C High-Resolution Sonic Eight-Sector Cement Bond Logging Tool

Integrated CBL/VDL and eight-sector sonic measurement, 175 °C / 140 MPa, compatible with 530 and most domestic logging systems.

The HRSG-1C combines a sonic array, a lower electronics section (transmit circuit) and an upper electronics section (receive circuit), connected into a single unit through high-temperature, high-pressure sealed pins. It integrates conventional high-resolution sonic logging with eight-sector sonic logging.

The sonic array is a single-transmitter, five-receiver design. The eight-sector receiving transducers are set at a 1.5 ft source distance and consist of eight individual elements. HRSG-1C can be run on the 530 system and on most domestic logging systems.

Applications

Travel-time logging — determine formation lithology along the well profile, estimate reservoir porosity and identify gas-bearing zones.
Eight-sector logging — the short source distance reveals problems in the cement bond and provides directional information.
CBL logging — quantitative interpretation of cement quality at interface I.
VDL logging — qualitative interpretation of cement quality at interface II.

Specifications
Maximum operating temperature	175 °C
Maximum pressure	140 MPa
Tool length	3,750 mm
Effective length	3,050 mm
Tool OD	Ø89 mm
Source distance	1.5 ft, 3 ft
Spacing	8 in (203.2 mm)
Eight-sector measurement point	1,922 mm
CBL measurement point	1,465 mm
VDL measurement point	855 mm
Weight	97 kg
Maximum logging speed	700 m/h
Power supply	250 V AC, 50–60 Hz

FH-HEDL High-Temperature, High-Pressure Slimhole Dual Laterolog

Dual laterolog with two depths of investigation for high-resistivity formations and low-mud-resistivity wells — 230 °C / 172 MPa in a Ø70 mm tool.

The HEDL dual laterolog measures formation resistivity at two different radial depths of investigation using a radial series principle, with two operating frequencies allowing simultaneous measurement. The difference between the shallow and deep resistivity is used to calculate water saturation and to distinguish oil-bearing from water-bearing zones. The tool is well suited to formations with high resistivity and to wells with low mud resistivity.

The tool is powered at 200 V DC and communicates over the 1553 bus. The electronics include transmit power control, deep and shallow drive circuits, voltage and current detection circuits, deep voltage correction, data conversion and communication, and power supply circuits.

Tool string

ALPHA SUB — three-laterolog electrode section
TOROID — insulated sub with built-in shallow transmit transformer

Specifications
Maximum operating temperature	230 °C
Maximum temperature inside Dewar flask	177 °C
Maximum operating pressure	172 MPa
Supply voltage	200 V DC
Low-voltage outputs	+15 V DC, −15 V DC, +5 V DC, −5 V DC
OD	70 mm
Effective length	6,300 mm
Applicable borehole size	90–305 mm
Shallow laterolog range	0.2–100,000 Ω·m
Deep laterolog range	0.2–100,000 Ω·m
Measurement accuracy	±5%
Depth of investigation — deep	152–213 cm
Depth of investigation — shallow	61–91 cm

FH-HDIL High-Temperature, High-Pressure Slimhole Dual Induction / 8-Laterolog

Five curves — SP, ILD, ILM, LL8 and temperature — simultaneously, at 230 °C and 172 MPa.

The HDIL is an ultra-high-temperature, high-pressure slimhole dual induction / 8-laterolog tool rated for operation at up to 230 °C and 172 MPa, with excellent stability. It measures five curves simultaneously: spontaneous potential (SP), deep induction (ILD), medium induction (ILM), 8-laterolog (LL8) and temperature (TEMP).

The design is intended for slimhole wells where conventional induction tools cannot be deployed, and for formations requiring both induction and laterolog measurements in a single pass.

Specifications
Maximum operating temperature	230 °C
Maximum temperature inside Dewar flask	177 °C
Maximum operating pressure	172 MPa
Supply voltage	200 V DC
Maximum OD	76 mm
Total effective length	774 mm
Dynamic range — ILD	0.2–2,000 Ω·m
Dynamic range — ILM	0.2–2,000 Ω·m
Dynamic range — LL8	1.0–1,000 Ω·m
Dynamic range — SP	−80 to +200 mV DC
Practical range — ILD / ILM	0.2–200 Ω·m
Practical range — LL8	1–100 Ω·m
Measurement accuracy	±5%

FH-DIR High-Temperature, High-Pressure Slimhole Azimuth and Deviation Tool

Deviation, tool face, borehole azimuth and pad-1 azimuth derived from three orthogonal magnetic and gravity sensors — 230 °C / 172 MPa.

FH-DIR uses three mutually orthogonal magnetic sensors and three mutually orthogonal accelerometers to form two spatial coordinate systems, acquiring three geomagnetic components (magx, magy, magz) and three gravity components (ACCX, ACCY, ACCZ) in the prescribed installation orientation.

Taking the local geomagnetic field and gravitational acceleration as constant within a region, the geometric relationships among these six components are used to compute deviation, relative bearing (tool face), borehole azimuth and pad-1 azimuth. Together these four angles provide a complete picture of the tool string's position downhole.

Specifications
Maximum operating temperature	230 °C
Maximum temperature inside Dewar flask	177 °C
Maximum operating pressure	172 MPa
OD	70 mm
Weight	51 kg
Effective length	3.4 m
Shipping length	3.8 m
Deviation range / error	0–90° / ±0.5°
Tool face range / error	0–360° / ±3°
Borehole azimuth range / error	0–360° / ±3°
Pad-1 azimuth range / error	0–360° / ±3°

eGRT Gamma Ray Tool

Unshielded NaI detector for lithology identification, depth correlation, tracer and gravel-pack monitoring — Ø35/43 mm.

The eGRT measures the natural gamma radiation of the formation surrounding the borehole. The detector consists of a sodium-iodide crystal and a photomultiplier tube. It is unshielded, so it receives gamma rays from all directions.

For cased-hole measurements the tool uses a high-resolution, high-sensitivity modular design. Run together with a tracer tool and a gamma source, it can also be used for gravel-pack detection.

Applications

Lithology identification
Depth correlation
Identification of radioactive intervals
Tracer monitoring
Gravel-pack monitoring

Specifications
Maximum temperature	350 °F (177 °C)
Maximum pressure	15,000 psi (103.4 MPa)
OD	Ø35 mm / Ø43 mm
Operating voltage	+13 to +23 V DC
Current at 18 V	20 mA
Maximum count rate	2,000 cps (API)
Dead time	Negligible (below 1,000 API)
Standard calibration	1 count/API
Depth resolution	6 in (typical)

FRD-d LWD Focused Dual Laterolog Resistivity Tool

Two focused resistivity curves, button-electrode imaging and near-bit geosteering — in a 175 °C / 140 MPa MWD-compatible collar.

The FRD-d LWD tool uses a current-type laterolog with software focusing to acquire two formation apparent-resistivity curves, with depths of investigation greater than 500 mm and greater than 250 mm respectively. The tool can be integrated into an MWD system, supporting both real-time data transmission and memory recording to deliver LWD measurements.

FRD-d also incorporates button electrodes for borehole-wall resistivity imaging, and a near-bit communication module that allows it to be combined with near-bit measurement subs for geosteering and formation evaluation.

Tool specifications
	FRD415-d	FRD475-d
Tool OD	Antenna 4.15 in / 105 mm Wear band 4.33 in / 110 mm	Antenna 4.84 in / 123 mm Wear band 5.25 in / 133 mm
Length	18.45 ft (221.5 in) / 5,630 mm	15.4 ft (185 in) / 4,700 mm
Connection	NC-31 box	3½ in IF (NC-38) box
Equivalent bending stiffness	25.82 ft (4.125 in × 2 in)	17.8 ft (4.75 in × 2.25 in)
Make-up torque	7,000 lbf·ft (9,500 N·m)	8,800 lbf·ft (12,000 N·m)
Maximum mud flow rate	160 gpm (10 L/s)	320 gpm (20 L/s)
Maximum dogleg — rotating	15°/100 ft	15°/100 ft
Maximum dogleg — sliding	30°/100 ft	30°/100 ft
Maximum operating temperature	347 °F (175 °C)	347 °F (175 °C)
Maximum operating pressure	20,000 psi (140 MPa)	20,000 psi (140 MPa)
Maximum sand content	3% by volume	3% by volume

Measurement
Measurement range	0.2–20,000 Ω·m
Measurement accuracy	±5%, or ±0.06 Ω·m, or ±0.025 mmho — whichever is greater
Depth of investigation	Shallow: 250–300 mm; deep: >500 mm
Vertical resolution	180 mm
Continuous operating time	>200 h
Memory capacity	16 GB

FHDA Dipole Array Sonic Logging Tool

Monopole, dipole, quadrupole and cross-dipole full-waveform logging for anisotropy, rock mechanics and fracture analysis.

The FHDA dipole array sonic tool consists of a data acquisition sub, a receiver sub, an isolator sub, a transmitter sub and a transmitter control sub.

It performs monopole sonic travel-time logging, monopole full-waveform logging, sonic variable-density logging, dipole full-waveform logging and cross-dipole full-waveform logging. The high-performance dipole transmitter and receiver make it possible to acquire shear-wave signals even in soft formations.

Principal applications

Computation of rock mechanics parameters
Lithology identification
Gas-zone identification
Determination of fractured intervals, fracture types and areal effectiveness
Formation anisotropy analysis
In-situ stress computation and borehole stability analysis

Sub assemblies

FHDA-EA — acquisition and telemetry sub; 8-channel multipole acquisition over WTS or LDT bus. 175 °C/8 h, 140 MPa, Ø90 mm, 1.52 m.
FHDA-MC — receiver sub, third-generation XMAC-type design; 8 receivers at 0.5 ft, 0.5–30 kHz. Ø98.5 mm, 3.32 m.
FHDA-PB — isolator sub; attenuates and delays the direct wave; suitable for wireline and pipe-conveyed work. Tension 45,000 lbf (20,411 kg).
FHDA-BA — transmitter sub; monopole (1.0–20 kHz), dipole (0.5–5 kHz) and quadrupole transmitters, oil-filled.
FHDA-FA — transmitter control sub; firing pulses and sequence control. Ø85.7 mm, 33.6 kg.

Specifications
Maximum operating temperature	175 °C (8 h operation)
Maximum pressure	140 MPa
Monopole full waveform	40–300 μs/ft
Dipole full waveform	80–1,000 μs/ft
Quadrupole full waveform	80–1,000 μs/ft
Stoneley full waveform	180–600 μs/ft
Tool length	35 ft 11.5 in (10.96 m)
Maximum OD	9.86 cm
Borehole range	11.4–45.5 cm
Maximum tensile load	26,500 lbf (12,000 kg)
Logging speed — array mode	25 ft/min (5.81 m/min)
Logging speed — Δt mode	30 ft/min (10.11 m/min)
Number of receivers	8, at 0.5 ft spacing

iDL Through-Drillpipe Dual Laterolog (uTHRU-uDL)

Through-drillpipe dual laterolog with SP — 0.2 to 40,000 Ω·m, 175 °C / 140 MPa, Ø57 mm.

The iDL through-drillpipe dual laterolog string consists, from bottom to top, of a dual laterolog probe (iDL-M), dual laterolog electronics (iDL-E), an insulated sub, hard electrode 3 (iRB-SP), hard electrode 2 (iRB-B) and hard electrode 1 (iRB).

The tool provides two resistivity curves at different depths of investigation plus an SP curve. Combined with other logs it allows permeable zones to be identified, oil-water contacts to be determined, and formation hydrocarbon potential to be evaluated accurately.

The tool string applies a defined algorithm to the measured current and voltage to control laterolog power, improving power output and the received signal-to-noise ratio. Dual guard electrodes focus the main current, reducing the influence of the cable, formation and mud. The electrodes use stainless steel with fibreglass-reinforced insulating sleeves — corrosion-resistant and easy to service.

iDL electronics and probe
Effective length — probe	3.95 m
Effective length — electronics	2 m
Shipping length — probe	4.35 m (14.27 ft)
Shipping length — electronics	2.4 m (7.87 ft)
OD	57 mm (2.25 in)
Weight — complete tool	70 kg (probe 50 kg, electronics 20 kg)
Maximum temperature	175 °C (350 °F), 4 h operation
Maximum pressure	140 MPa (20,000 psi)
Tensile strength	40,000 lbf
Compressive strength	20,000 lbf
Depth of investigation — shallow	0.8 m (31.5 in)
Depth of investigation — deep	2.7 m (106.3 in)
Measurement range	0.2–40,000 Ω·m
Accuracy (homogeneous formation)	0.2–1 Ω·m: ±20% or ±0.06 Ω·m 1–2,000 Ω·m: ±5% 2,000–5,000 Ω·m: ±10% 5,000–40,000 Ω·m: ±20% or ±0.025 mS/m
Supply voltage	60 V DC
Maximum logging speed	60 ft/min (1,098 m/h)
Vertical resolution	2 ft (61 cm)

Hard electrode and insulated sub
Hard electrode length	3.76 m
Insulated sub length	419 mm
OD	Ø57 mm
Weight	45 kg (electrode) / 5.9 kg (insulated sub)
Maximum temperature	175 °C (350 °F), 1 h
Maximum pressure	140 MPa (20,000 psi)
Tensile / compressive strength	40,000 lbf / 20,000 lbf

Φ22 MPT Multi-Parameter Production Logging Tool (Simplex Pulse Code)

Seven-parameter production profiling through the annulus — CCL, temperature, pressure, gamma, water holdup, flow and density in a Ø22 mm tool.

The 22MPT comprises a temperature/pressure/CCL combination tool (22PTC), a water-holdup/flow combination tool (22WHF), a micro-source density tool (22RFD) and a gamma ray tool (22GR). Auxiliary tools include a cable head, a tracer tool (22TR), a flow basket (22DB) and a flex sub.

Applications

Measurement of downhole CCL, temperature, pressure, natural gamma, water holdup, flow velocity and fluid density.
22PTC — the CCL controls logging depth and provides depth correction during interpretation. The temperature tool records the gradient created by fluid entering or leaving the wellbore. The pressure tool records the pressure profile around the wellbore.
22GR + 22TR — important for water-entry and leak-detection work. In annular logging, where sand production in heavy oil can disable a turbine flowmeter, the combination replaces turbine flow measurement and improves job success.
22WHF + 22DB — through-annulus production logging, accurately measuring water holdup and flow rate between casing and tubing; suitable for low-flow wells.
22RFD — multiphase production profiling, fluid identification and high-flow-rate measurement.

General
Maximum temperature	150 °C
Maximum pressure	60 MPa
Supply voltage	+35 to +40 V DC
OD	Ø22 mm / Ø26 mm

22PTC · temperature / pressure / CCL
Length	1.192 m
CCL signal change	≥600 Hz
Temperature range	0–150 °C
Temperature response time	<1 s
Temperature accuracy	±1.4 °C
Temperature resolution	0.1 °C
Pressure range	1–600 kg/cm²
Pressure accuracy	±0.7 kg/cm²
Pressure resolution	0.1 kg/cm²

22WHF · water holdup / flow
Length	0.84 m
Holdup range	0–90%
Holdup resolution / accuracy	3% / ±5%
Flow range	2–20 m³/d
Flow start-up rate	2 m³/d
Flow accuracy	1 m³/d

22GR gamma · 22RFD density
Gamma range	0–2,000 cps (API)
Gamma sensitivity	≥0.3 cps/API
Density range	0–1.5 g/cm³
Density resolution / accuracy	0.01 g/cm³ / ±0.02 g/cm³

eMPT Enhanced Duplex Pulse-Code Production Logging System

Manchester-encoded duplex telemetry up to 200 kbit/s uplink, Warrior-compatible, with a twelve-tool production logging string.

The eMPT uses enhanced Manchester encoding, with selectable uplink data rates of 0, 71, 100, 143 and 200 kbit/s and a downlink rate of 300 bit/s. It can be connected to Warrior surface systems.

The tool string is modular: a single variable-rate telemetry sub carries the measurement package required for the well, from a quartz pressure and CCL tool through to a six-arm fullbore flowmeter.

Tool string

eTU Variable-rate telemetry sub, Ø26/35/43 mm

eQPC Quartz pressure and CCL

eCTF Water holdup, temperature and flow

eGRT Gamma ray

eCFS Continuous flowmeter

eJBF Jewel-bearing flowmeter

e3FF Three-arm fullbore flowmeter

e6FF Six-arm fullbore flowmeter

eISF Inline flowmeter

eTFD Tuning-fork densitometer

eRFD Micro-source density

eDCT X-Y caliper

Auxiliary tools

eCHD Cable head

eSBC Spring centralizer

e4RC Four-arm roller centralizer

eNKS Flex sub

eSWS Swivel sub

Other series

Additional product families are available. Full specifications are supplied with the quotation for each series.

Series overview
WILS-A series	High-speed pulse-code imaging logging system — 175 °C / 140 MPa, Ø92 mm
EELS series	Ultra-high-temperature, high-pressure slimhole logging system — 260 °C / 210 MPa, Ø79 mm
uTHRU series	Through-drillpipe logging system (iDL dual laterolog is part of this family)
α-series	MWD/LWD system
Cement bond evaluation	HRSG-1C and related eight-sector tools
Auxiliary	Centralizers, flex and rotating subs, cable heads, insulated subs, hard electrodes

Fenghe also supplies tool-string engineering support: we will review your well programme, temperature and pressure profile, dogleg severity and logging objectives, and propose a configuration — including which tools can be combined in a single run.

Datasheets for the WILS-A and EELS series and for individual auxiliary tools are available on request.

Request a datasheet

Systems for the wells that punish equipment.

PILS-X Extended-Reach Push Logging System

WILS-P High-Speed Pulse-Code High-Temperature Logging Platform

Design highlights

Main logging tools

Auxiliary tools

HRSG-1C High-Resolution Sonic Eight-Sector Cement Bond Logging Tool

Applications

FH-HEDL High-Temperature, High-Pressure Slimhole Dual Laterolog

Tool string

FH-HDIL High-Temperature, High-Pressure Slimhole Dual Induction / 8-Laterolog

FH-DIR High-Temperature, High-Pressure Slimhole Azimuth and Deviation Tool

eGRT Gamma Ray Tool

Applications

FRD-d LWD Focused Dual Laterolog Resistivity Tool

FHDA Dipole Array Sonic Logging Tool

Principal applications

Sub assemblies

iDL Through-Drillpipe Dual Laterolog (uTHRU-uDL)

Φ22 MPT Multi-Parameter Production Logging Tool (Simplex Pulse Code)

Applications

eMPT Enhanced Duplex Pulse-Code Production Logging System

Tool string

Auxiliary tools

Other series

Not sure which tool string fits your well?